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| Titel |
Crop harvest in Denmark and Central Europe contributes to the local load of airborne Alternaria spore concentrations in Copenhagen |
| VerfasserIn |
C. A. Skjøth, J. Sommer, L. Frederiksen, U. Gosewinkel Karlson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 12, no. 22 ; Nr. 12, no. 22 (2012-11-22), S.11107-11123 |
| Datensatznummer |
250011618
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| Publikation (Nr.) |
 copernicus.org/acp-12-11107-2012.pdf |
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| Zusammenfassung |
| This study examines the hypothesis that Danish agricultural areas are the
main source of airborne Alternaria spores in Copenhagen, Denmark. We suggest that the
contribution to the overall load is mainly local or regional, but with
intermittent long distance transport (LDT) from more remote agricultural
areas. This hypothesis is supported by investigating a 10 yr bi-hourly
record of Alternaria spores in the air from Copenhagen. This record shows 232
clinically relevant episodes (daily average spore concentration above
100 m−3) with a distinct daily profile. The data analysis also revealed
potential LDT episodes almost every year. A source map and analysis of
atmospheric transport suggest that LDT always originates from the main
agricultural areas in Central Europe. A dedicated emission study in cereal
crops under harvest during 2010 also supports our hypothesis. The emission
study showed that although the fields had been treated against fungal
infections, harvesting still produced large amounts of airborne fungal
spores. It is likely that such harvesting periods can cause clinically
relevant levels of fungal spores in the atmosphere. Our findings suggest
that crop harvest in Central Europe causes episodes of high airborne
Alternaria spore concentrations in Copenhagen as well as other urban areas in this
region. It is likely that such episodes could be simulated using atmospheric
transport models. |
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